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Einstein work on the photoelectric effect provided support for the equation:

1. E = hν
2. E = mc^2
3. E = -Rhc/n^2
4. K.E. = 1/2 mv^2

Correct answer: E = hν

Solution

Einstein's work on the photoelectric effect demonstrated that light behaves as particles called photons, with energy given by E = hν, where h is Planck's constant and ν is the frequency of light.

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